Capital Stock - Dividends (Details) - $ / shares	Jul. 17, 2023	May 17, 2023	Apr. 17, 2023	Feb. 22, 2023	Jan. 17, 2023	Oct. 26, 2022
8.625% Series A Cumulative, Perpetual Preferred Stock
Dividends
Cash dividend declared (in dollars per share)		$ 0.53906		$ 0.53906		$ 0.53906
Cash dividend paid (in dollars per share)	$ 0.53906		$ 0.53906		$ 0.53906
8.375% Series B Cumulative, Perpetual Preferred Stock
Dividends
Cash dividend declared (in dollars per share)		$ 0.52344		$ 0.52344		$ 0.52344
Cash dividend paid (in dollars per share)	$ 0.52344		$ 0.52344		$ 0.52344